Beretta Power Plus Box 150, Руководство по установке, Страница: 26 / 60

26
2 8 Flue gas evacuation for installations in a central heating plant
When constructing evacuation lines for installations in a central heating plant, materials must be used that are resistant
to products of combustion (temperature between 40 °C and 100 °C, relative humidity also above 100%), in class W1
according to UNI EN 1443, typically stainless steel or plastic materials. It is also necessary to guarantee the tightness of
the entire evacuation line with regard to the permeability of condensed steam and gas pursuant to the current regulation
(UNI EN 1443).
The connection sections between the chimney and the boiler must have a minimum slope of 3° towards the boiler so that
any condensate that forms in this line section can be evacuated using a suitable exhaust device.
The
Power Plus Box
modular condensing systems have been approved complete with a flue gas evacuation line in self-ex-
tinguishing PP or suitable materials based on EN 677 and correlated standards.
The flue gas exhaust system foresees the use of pipes with the diameters indicated in the table.
All of the indicated diameters refer to lines in self-extinguishing polypropylene (class B1), implemented with pipes with
socketed connections or equivalent lines.
The maximum equivalent length of the flue gas evacuation lines is indicated in the table. Each modular system is provided
with 2 female socketed connections Ø 160 mm for the exhaust of combustion products to the right and to the left.
Description
Maximum useful
output (kW)
Maximum equivalent
length (m)
Flue gas evacuation
line diameter (mm)
Power Plus Box
150 ≤ 150 60 160
Power Plus Box
200 ≤ 200 60 160
(
Power Plus Box
150) x 2 ≤ 300 55 160
..... ≤ 350 55 160
..... ≤ 400 55 160
..... ≤ 450 40 160
..... ≤ 500 30 160
..... ≤ 550 30 160
..... ≤ 600 25 160
..... ≤ 650 30 200
..... ≤ 700 30 200
..... ≤ 750 30 200
( Power Plus Box 200) x 4 ≤ 800 30 200
Equivalent length for the various line elements (m)
Type of element
with Ø 160 mm with Ø 200 mm
45° bend 1,7 1,7
87° bend 7,5 7,5
T-union 7,5 7,5
b
The flue must be sized according to the current standard UNI 7129 and be as straight as possible without obstruc-
tions or constrictions.
b
A steam trap is mandatory for flue gas lines longer than 3 metres.
b
Make sure that there is a minimum slope of 3° in the horizontal sections of the flue gas manifold to avoid the accu-
mulation of condensation.
b
In the event of installation with air intake from the premises (both in the heating unit and externally) avoid obstructing
the passage of air under the metal cupboard.